Artificial intelligent assistant

waist-tree

waist-tree Naut.
  (See quot. 1846.)

1485 Nav. Acc. Hen. VII (1896) 50 Wast trees..ij. 1627 Capt. J. Smith Sea Gram. ii. 9 The Waist boords are set vp in the Ships waist, betwixt the Gun-waile and the waist trees. 1704 J. Harris Lex. Techn. I, Wast-Trees, are those Timbers of a Ship which lie in the Waste. 1846 A. Young Naut. Dict., Waist-Tree or Rough-Tree, a spare spar placed along the side of a ship's waist where there happens to be no bulwark, in order to protect persons from falling overboard.

Oxford English Dictionary

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